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Structure assignment of natural quinic acid derivatives using proton nuclear magnetic resonance techniques

✍ Scribed by G. F. Pauli; F. Poetsch; A. Nahrstedt

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 361 KB
Volume: 9
Category: Article
ISSN: 0958-0344
DOI: 10.1002/(sici)1099-1565(199807/08)9:4<177::aid-pca404>3.0.co;2-3

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✦ Synopsis

The proton nuclear magnetic resonances (NMR) of seven naturally occurring hydroxycinnamoylquinic acids were analysed in order to obtain full sets of shift values and spin-spin coupling constants, as well as information about solution conformation. Based on this study, specific rules for proton substituent chemical shifts are derived, allowing the distinction of position isomers and single caffeoyl subunits in oligosubstituted quinic acids.

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